Slitherine

When ever i try to install the gave i get the following error:

A:\Slithering\Warhammer 40,000 Armageddon\ArmageddonGame.exe
A decompression error has occurred (#2026)
Unknown decompression error

i have tried installing multiple times and i always get the same error, my anti virus also keeps popping up saying that ArmageddonGame.exe is a Win32/Heur virus

Where are you trying to install to? The A drive is a floppy disk normally!

A drive is my second hard drive, i dont have a floppy drive anymore